n. 枯燥无味的工作[生活方式]( treadmill的复数形式 ); （尤指旧时由人或牲畜踩动踏板使之转动的）踏车; （锻炼身体的）跑步机, 走步机
英文释义
n. an exercise device consisting of an endless belt on which a person can walk or jog without changing place
n. a mill that is powered by men or animals walking on a circular belt or climbing steps
n. a job involving drudgery and confinement